Streptococcal Invasive Disease Group A, 2010
MDH has been conducting active surveillance for invasive disease caused by group A Streptococcus (GAS), also known as Streptococcus pyogenes, since 1995. Invasive GAS is defined as GAS isolated from a usual sterile site such as blood, cerebrospinal fluid, or from a wound when accompanied with necrotizing fasciitis or streptococcal toxic shock syndrome (STSS).
One hundred fifty-eight cases of invasive GAS disease (3.0 per 100,000), including 13 deaths, were reported in 2010, compared to 189 cases and 21 deaths in 2009. Ages of cases ranged from 2 months to 101 years (median, 54 years). Sixty-one percent of cases were residents of the metropolitan area. Thirty-six (22%) cases had bacteremia without another focus of infection, 57 (36%) cases had cellulitis, and 22 (14%) cases had an abscess. There were 14 (9%) cases of primary pneumonia and 8 (5%) cases of necrotizing fasciitis. Fourteen (9%) cases had septic arthritis and/or osteomyelitis, and 6 (3%) had STSS. Ten (6%) cases were residents of 10 different long-term care facilities.
The 13 deaths included 3 cases of bacteremia without another focus of infection, 2 cases of pneumonia, and 2 cases with cellulitis and necrotizing fasciitis. The 6 remaining fatal cases had cellulitis, myositis and STSS (1); STSS (1); necrotizing fasciitis (1); systemic inflammatory response syndrome (1); osteomyelitis (1); and septic arthritis (1). The deaths occurred in persons ranging in age from 13 years to 97 years. Health histories were available for 11 cases who died and all had underlying medical conditions. The conditions most frequently reported were diabetes (5) and congestive heart failure (5).
- For up to date information see>> Group A Streptococcus (GAS)
- Full issue>> Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health, 2010